WINDOW PERIOD:

Lasts up to 6 months

ACUTE PRIMARY INFECTION:

Lasts 1-2 weeks

ASYMPTOMATIC PHASE:

Lasts 3-15 years

Median 9 years

SYMPTOMATIC PHASE WITH PERSISTENT GENERALIZED LYMPHADENOPATHY:

Lasts 1-3 years

DEFINABLE AS AIDS CASE:

Lasts 1-3 years